diff --git a/apps/dashboard/src/lib/remote-development-environment/config-file.test.ts b/apps/dashboard/src/lib/remote-development-environment/config-file.test.ts
index 0bf7f30f6..f94f164f4 100644
--- a/apps/dashboard/src/lib/remote-development-environment/config-file.test.ts
+++ b/apps/dashboard/src/lib/remote-development-environment/config-file.test.ts
@@ -1,5 +1,4 @@
-import { mkdtempSync, rmSync, writeFileSync } from "fs";
-import { tmpdir } from "os";
+import { mkdtempSync, readFileSync, rmSync, writeFileSync } from "fs";
 import { join } from "path";
 import { afterEach, describe, expect, it, vi } from "vitest";
 
@@ -8,7 +7,7 @@ vi.mock("server-only", () => ({}));
 let tempDir: string | undefined;
 
 function writeTempConfig(content: string): string {
-  tempDir ??= mkdtempSync(join(tmpdir(), "stack-rde-config-"));
+  tempDir ??= mkdtempSync(join(process.cwd(), ".stack-rde-config-test-"));
   const configPath = join(tempDir, "stack.config.ts");
   writeFileSync(configPath, content, "utf-8");
   return configPath;
@@ -23,6 +22,56 @@ afterEach(() => {
 });
 
 describe("remote development environment config file", () => {
+  it("loads config exports wrapped in defineStackConfig", async () => {
+    const configPath = writeTempConfig(`
+      import { defineStackConfig } from "@stackframe/stack-shared/config";
+
+      export const config = defineStackConfig({
+        auth: {
+          allowSignUp: true,
+        },
+      });
+    `);
+
+    const { readConfigFile } = await import("./config-file");
+
+    await expect(readConfigFile(configPath)).resolves.toMatchInlineSnapshot(`
+      {
+        "config": {
+          "auth": {
+            "allowSignUp": true,
+          },
+        },
+        "showOnboarding": false,
+      }
+    `);
+  });
+
+  it("loads config exports wrapped in defineHexclaveConfig", async () => {
+    const configPath = writeTempConfig(`
+      import { defineHexclaveConfig } from "@stackframe/stack-shared/config";
+
+      export const config = defineHexclaveConfig({
+        auth: {
+          allowSignUp: false,
+        },
+      });
+    `);
+
+    const { readConfigFile } = await import("./config-file");
+
+    await expect(readConfigFile(configPath)).resolves.toMatchInlineSnapshot(`
+      {
+        "config": {
+          "auth": {
+            "allowSignUp": false,
+          },
+        },
+        "showOnboarding": false,
+      }
+    `);
+  });
+
   it("loads config exports produced by TypeScript function calls", async () => {
     const configPath = writeTempConfig(`
       function makeConfig() {
@@ -90,4 +139,73 @@ describe("remote development environment config file", () => {
       }
     `);
   });
+
+  it("treats the onboarding placeholder as an empty config", async () => {
+    const configPath = writeTempConfig(`
+      export const config = "show-onboarding";
+    `);
+
+    const { readConfigFile } = await import("./config-file");
+
+    await expect(readConfigFile(configPath)).resolves.toMatchInlineSnapshot(`
+      {
+        "config": {},
+        "showOnboarding": true,
+      }
+    `);
+  });
+
+  it("rejects modules without a valid config export", async () => {
+    const configPath = writeTempConfig(`
+      export const config = () => ({ auth: { allowSignUp: true } });
+    `);
+
+    const { readConfigFile } = await import("./config-file");
+
+    await expect(readConfigFile(configPath)).rejects.toThrow(`Invalid config in ${configPath}.`);
+  });
+
+  it("can rewrite a dynamic config into the rendered static format", async () => {
+    const configPath = writeTempConfig(`
+      export const config = {
+        auth: {
+          allowSignUp: false,
+        },
+      };
+    `);
+    const { readConfigFile, writeConfigObject } = await import("./config-file");
+    const current = await readConfigFile(configPath);
+
+    writeConfigObject(configPath, {
+      ...current.config,
+      "payments.testMode": true,
+    });
+
+    expect(readFileSync(configPath, "utf-8")).toMatchInlineSnapshot(`
+      "import type { StackConfig } from "@stackframe/js";
+
+      export const config: StackConfig = {
+        "auth": {
+          "allowSignUp": false
+        },
+        "payments": {
+          "testMode": true
+        }
+      };
+      "
+    `);
+    await expect(readConfigFile(configPath)).resolves.toMatchInlineSnapshot(`
+      {
+        "config": {
+          "auth": {
+            "allowSignUp": false,
+          },
+          "payments": {
+            "testMode": true,
+          },
+        },
+        "showOnboarding": false,
+      }
+    `);
+  });
 });